# netintel.dev GPT-4o Chat Completions (x402)

> netintel.dev GPT-4o Chat Completions (x402) is a paid API for AI agents from netintel.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Proxies OpenAI GPT-4o chat completions via a pay-per-call x402 endpoint — no OpenAI account or API key required, $0.10 USDC per request.

## Facts

- Endpoint: POST https://netintel.dev/openai/gpt-4o
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-dev-gpt-4o-chat-completions-x402-64b928fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ae7WhseJwXAawaaNO_3_j

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability netintel-dev-gpt-4o-chat-completions-x402-64b928fa -d '<json body>'
```

Example prompt: Ask GPT-4o to write a concise executive summary of the following meeting transcript — I don't have an OpenAI API key so use the pay-per-call proxy, paying $0.10 USDC per request.

## When to prefer this

Choose this endpoint when your agent or pipeline needs GPT-4o capabilities but you cannot or do not want to manage an OpenAI API key or billing account — ideal for pay-per-call usage patterns, agentic workflows billed in USDC via x402, or one-off tasks where provisioning full OpenAI credentials is impractical. Prefer the gpt-4o-mini sibling for cost-sensitive high-volume tasks, or the gpt-4.1 sibling for the latest OpenAI model.

## Known failure modes

- Insufficient USDC balance or failed x402 payment results in 402 Payment Required
- Input exceeds the proxy's capped token limit, returning a 400 error
- OpenAI upstream timeout or unavailability propagates as a 502 or 503
- Malformed messages array (wrong role names, missing content) returns a 400 validation error
- Rate limiting on the proxy tier returns a 429 Too Many Requests

## How this service works

Call OpenAI's gpt-4o via a single pay-per-call x402 endpoint — no OpenAI account or API key needed, pay $0.10 per request in USDC. Standard OpenAI chat.completions shape. EVERY call is bounded by a 16000-token combined input budget (real tokenizer) plus the 48000-char cap; output 2048. Vision: up to 4 https image_url parts (detail low/high/auto). Search terms: OpenAI, gpt-4o, vision, image input, chat completion, LLM, no API key.

## Output

Returns a standard OpenAI chat.completions response object containing the assistant's generated message, finish reason, and token usage counts — identical in shape to the OpenAI API response, with capped input and output token limits enforced by the proxy.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "messages": {
       "type": "array",
       "description": "OpenAI chat messages: [{role, content}]. content is text, or parts: {type:'text',text} and (user role, max 4 per call) {type:'image_url',image_url:{url:'https://…',detail:'low'|'high'|'auto'}}. EVERY request — with or without images — must fit a 16000-token combined input budget and a 48000-char cap.",
       "items": {
        "type": "object",
        "properties": {
         "role": {
          "type": "string",
          "description": "system, user, or assistant"
         },
         "content": {
          "description": "Message text, or content parts: {type:'text',text} / {type:'image_url',image_url:{url,detail}}"
         }
        },
        "required": [
         "role",
         "content"
        ]
       }
      },
      "max_tokens": {
       "type": "number",
       "description": "Max output tokens. Optional — defaults to 2048, capped at 2048."
      },
      "temperature": {
       "type": "number",
       "description": "Sampling temperature. Optional."
      },
      "top_p": {
       "type": "number",
       "description": "Nucleus sampling. Optional."
      }
     },
     "required": [
      "messages"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "id": {
       "type": "string"
      },
      "object": {
       "type": "string",
       "description": "Always 'chat.completion'"
      },
      "created": {
       "type": "number",
       "description": "Unix timestamp (seconds)"
      },
      "model": {
       "type": "string"
      },
      "choices": {
       "type": "array",
       "description": "Assistant message + finish_reason."
      },
      "usage": {
       "type": "object",
       "description": "prompt_tokens, completion_tokens, total_tokens"
      }
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-abc123",
  "model": "gpt-4o",
  "usage": {
   "total_tokens": 13,
   "prompt_tokens": 11,
   "completion_tokens": 2
  },
  "object": "chat.completion",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "Hi!"
    },
    "finish_reason": "stop"
   }
  ],
  "created": 1735689600
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-dev-gpt-4o-chat-completions-x402-64b928fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)